Horseshoe.



D. l. GARRETSON.

HORSESHOE.

APPLICATION FILED NOV- 3. I911.

Patented Aug. 10, 1915.

' (inventor DAVID I. cnnnnrson,

on NEW YORK, N. Y.

HORSESHOE.

To all'wkom it may concern:

Be it known that I, DAvm I. GARRETSON, a citizen of theUnited States, and a resident of the city, county, and Sta'te of New York, have invented certain new and useful Improvements in Horseshoes, of which the followingis a specification.

My invention relates to improvements in horse shoes and the object thereof is to provide a shoe which Will so grip the road as to.

; prevent slipping even under extraordinary conditions, as when the road is wet or coated with ice or snow.

Another object of my invention is to construct a shoe for such purpose which will be. very inexpensive to manufacture so that the cost will be as near as may be to the cost of the ordinary shoes in common use, but one which will wear longer.

My invention belongs to that class of shoe in which the shoeproper or frame, and the tread are formed separately and the tread secured to the frame. Various devices in this class have been proposed, one of which is shown in the U. S. patent to I-lubner, No. 873,373, dated December 10, 1907, wherein the tread is formed separately from a num ber of strips of fabric of woven wire, which are inserted in and held by the shoe frame. Thev wires of the tread engage at their ends with the road surface and form the tread of the shoe.

The object of my present invention is to construct a shoe which will have even greater non-slipping qualities than the said Hubner shoe, but which will be much less expensive to manufacture. In the Hubner shoe it is necessary to form the inserted tread from a number of pieces of woven wire fabric which latter have to be woven more or less by hand from expensive material, whereas in my present shoe the tread may be very cheaply formed from common commercial metals. In the said Hubner shoe the number of wires which can be inserted in a given shoe are limited by the nature of the tread and the combined areas of the ends of the wires are therefore small, so that the shoe is not only expensive to make but its life is comparatively short.

I find it desirable to construct the shoe proper or frame and the tread separately, so that the tread may be tempered hard without tempering the frame, which, for practical reasons, should not be made too hard; and I also find it desirable to form the frame Specification of Letters Patent.

Patented Aug. 10, 1915.

Application filed November 3, 1911. Serial No. 658,296.

around the greater portion of one face of the shoe and also having means for bold ing the tread against lateral strains: and I construct, a separate tread from sheet metal by bending a strip or ribbon of comparatively thin metal in a zig-zag or serpentine formation. The separately formedtread is inserted into the channel of the frame so that its edge forms the tread of the shoe not only when first used, but also as the separately formed tread wears down during use. The interstices caused by the bending of the plate or sheet which forms the tread are preferably left open so that the edge of the tread, upon which the shoe rests will firmly grip the road surface at all times and prevent slipping.

I form the separate tread of a metal (preferably steel) high in carbon, while in I form the shoe proper or frame of a softer metal and then temper the tread (and preferably without hardening the frame) after the tread has been inserted in the frame. The tread will be tempered. much harder than the frame owing to the fact that it is made of high carbon metal and the frame will not be rendered too hard or brittle for practical purposes.

Further details of my invention and the advantages thereof will appear hereinafter.

Figure l, is a plan view of the under or tread side of a shoe embodying my improvements in which a portion of the tread is omitted to disclose the retaining channel. Fig. 2, is a cross section taken on the line 2-2 of Fig. 1, and Fig. 3, is a perspective view of a portion of the tread as shaped and ready for insertion into the channel.

The shoe proper or frame is shown at 1, I

\ upwardly from the flange 4, and taper on reverse 'CUIYGS, 1.

each side 9. The'flanges 3 and 4:, form the channel for the inserted tread and projections 6 and 8, rise above them'and support 1 the tread laterally but their top surfaces are small so that they will wear away fast when the tread is worn down to the level of their top-surfaces,'-in order that these projections will not predominate as part of the tread and overcome the non-slipping action of the latter. The tread is constructed independently of this frame, and of a metal having a large percentage of carbon in order that it may be tempered to a oonsiderabledegree of hardness.

The tread 10, is formed of a strip] of flat metal preferably of uniform thickness throughout and of a width suflicientto cause the same to project above the frame of the shoe when inserted on edge, wearing tread for the shoe. I bend this plate 10, into such shape, while in its soft or annealed condition, that I am enabled to lace a large quantity within the channel of 'he frame and provide an edge of such configuration that it will resist the slipping ac- ;tion of the shoe in all directions. Preferably the same is formed into a succession of close proximity the tread as constructed .in this manner.

Starting at the point 11, the plate curves into a loop 12, from whence the curve reverses at 13, and at the opposite side of the tread is formed another loop 14, in reverse directionto'thefirst; from-whence the plate curves reversely at 15, to the opposite side of the tread and a'reverse loop 16, is formed:

. and so onuntil'the plate has been formed against the long enough for one or more shoes. The 'f-g'eneral direction of the tread when thus formed is preferably straight, but in order to insert thetread in the channel 2, of the shoe, it is curved or arched to conform to the channel. The tread is inserted in the channel 2, as'shown in Fig. 1 so that it lies edgewise or at right angles to the plane of the shoe, thu's presenting its projecting edge as'a wearing tread" for the shoe. The natural resiliency of the tread when it is arched tofplace it in the ch nnel causes it to bind flanges .3 'nd 4, and projections 6.and 8, and causes it to be held in place;

" melting point of spelter and but I- prefer to use additional and inexpensive means for holding the tread in place. For this purpose I place small quantities of spelter 22 in the bottom of the. channel 2, near'the side walls thereof. When the tread has been formed and inserted into the chan- 'nel 2," the entire shoe is heated above the ""ficiently to pr c a blu mp in h f tread;

when=the spelter will flux. After this treats temper the tread 10. Since the and form a forming loops arranged in to each other. I have shown preferably suftread has a high percentage or-carbbn and the shoe frame a very little or no carbon,

the former will become very hard, while the frame will remain suitable for its purpose.

lVhen the spelter cools it forms a meansfor firmly holding the tread 10, to the interior of the channel 2. It will be noted that the lower wall or bottom ,17, of the channel 2,

is depressed or concaved toward the middle so that when the tread is seated. therein it will restagainst the sides 18, of the bottom tread rests rigidly on the channel bottom at" each side and as the tread wears away at each top side edge leaving it raised near the middle 21, the feature will become more pronounced.- I

It will be apparent that a shoe construct. ed in'accordance with my invention will be durable and lasting sincethe active tread can be made very hard whilethe frame is not made brittle; while on the other hand the shoe can be very inexpensively made. Owing to the serpentine nature of the plate tread, which rests on its exposed edge slipping in all directions is prevented by the grip of the tread upon the road-surface. tread strip in the formation here shown I can get I have found that by curving the a very long strip of metal of a thickness which will lend itself readily to the bending operation, into a channel of given dimensions; and therefore, while preserving the advantages of a tread having open spaces,

the total area of the plate is considerably greater than the total areas of theends of the wires in a construction such as is shown in said Hubner patent and consequently the tread will have a longer life. The tread will remain in the channel with its edge exposed away, and the projections 6 and'8, having a small area and being of softer metal, never predominate as the tread wears down to their level, suflicient tohvercome the gripping action of the tread on the road, but wear down faster than the tread.

The projections 6 and 8, are shown disposed in-a relatively staggered relation, but this feature is not per 86. here claimed as it forms the subject matter of anga plication filed by me on the 20th day of eptember l9ll, and serially numbered 65037 8.

Having described my invent'pnwhat I claim is:- 1. A horse shoe comprising a metallic frame having a channel extending substantially around one face of the shoe, and a separately formed treadconsisting of a metal strap bent back and forth upon itself to form reversely arranged curved loops and intermediate reverse curves, isaid tread &

until the tread wears substantially:

being disposed edgewise in said channel whereby one edge thereof forms the Wearing surface of the shoe, and secured in said channel by being brazed to the shoe, so that the tread becomes an integral portion of the s ice.

2. A horse shoe comprising a frame having a channel extending substantially around one face of the shoe, and a separately formed tread consisting of a metal strip bent back and forth upon itself, and disposed in said channel whereby one edge will form the tread surface of the shoe, the parts being so arranged that portions of the bottom of the tread will rest on the bottom of said channel and the other portions thereof will be separated therefrom whereby the i said tread will be resilient.

. 3. A horse shoe comprising a frame havdisposed in said channel whereby one edge will form the tread surface of the shoe, the bottom of said channel being concave Where by the shid tread will rest on part of the bottom Wall and be resiliently separated from the convex portion thereof, and

spelter'for securing the tread to the shoe frames 1 St ned at the city, county and State of New-York, this 31st dayof October 1911.

DAVID r. GARRETSON.

W'itnesses:

EDWARD D. C. SPERRY, ANNA L. BAUE 

